Commit | Line | Data |
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46900298 JB |
1 | /* |
2 | * IBSS mode implementation | |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 9 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
d321cd01 | 10 | * Copyright(c) 2016 Intel Deutschland GmbH |
46900298 JB |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/delay.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
46900298 JB |
19 | #include <linux/if_ether.h> |
20 | #include <linux/skbuff.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/rtnetlink.h> | |
24 | #include <net/mac80211.h> | |
46900298 JB |
25 | |
26 | #include "ieee80211_i.h" | |
24487981 | 27 | #include "driver-ops.h" |
46900298 JB |
28 | #include "rate.h" |
29 | ||
30 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
46900298 JB |
31 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
32 | ||
33 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
34 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
dad9defd | 35 | #define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ) |
46900298 JB |
36 | |
37 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
38 | ||
d51b70ff SW |
39 | static struct beacon_data * |
40 | ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, | |
41 | const int beacon_int, const u32 basic_rates, | |
42 | const u16 capability, u64 tsf, | |
43 | struct cfg80211_chan_def *chandef, | |
cd7760e6 SW |
44 | bool *have_higher_than_11mbit, |
45 | struct cfg80211_csa_settings *csa_settings) | |
46900298 JB |
46 | { |
47 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
48 | struct ieee80211_local *local = sdata->local; | |
2103dec1 | 49 | int rates_n = 0, i, ri; |
46900298 JB |
50 | struct ieee80211_mgmt *mgmt; |
51 | u8 *pos; | |
52 | struct ieee80211_supported_band *sband; | |
d51b70ff | 53 | u32 rate_flags, rates = 0, rates_added = 0; |
c3ffeab4 JB |
54 | struct beacon_data *presp; |
55 | int frame_len; | |
2103dec1 | 56 | int shift; |
24487981 | 57 | |
46900298 | 58 | /* Build IBSS probe response */ |
c3ffeab4 JB |
59 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
60 | 12 /* struct ieee80211_mgmt.u.beacon */ + | |
61 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + | |
62 | 2 + 8 /* max Supported Rates */ + | |
63 | 3 /* max DS params */ + | |
64 | 4 /* IBSS params */ + | |
cd7760e6 | 65 | 5 /* Channel Switch Announcement */ + |
c3ffeab4 JB |
66 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
67 | 2 + sizeof(struct ieee80211_ht_cap) + | |
68 | 2 + sizeof(struct ieee80211_ht_operation) + | |
f1f3e9e2 JB |
69 | 2 + sizeof(struct ieee80211_vht_cap) + |
70 | 2 + sizeof(struct ieee80211_vht_operation) + | |
c3ffeab4 JB |
71 | ifibss->ie_len; |
72 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); | |
73 | if (!presp) | |
d51b70ff | 74 | return NULL; |
c3ffeab4 JB |
75 | |
76 | presp->head = (void *)(presp + 1); | |
77 | ||
78 | mgmt = (void *) presp->head; | |
46900298 JB |
79 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
80 | IEEE80211_STYPE_PROBE_RESP); | |
e83e6541 | 81 | eth_broadcast_addr(mgmt->da); |
47846c9b | 82 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 83 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
57c4d7b4 | 84 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 85 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
86 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
87 | ||
c3ffeab4 JB |
88 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
89 | ||
46900298 JB |
90 | *pos++ = WLAN_EID_SSID; |
91 | *pos++ = ifibss->ssid_len; | |
92 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
c3ffeab4 | 93 | pos += ifibss->ssid_len; |
46900298 | 94 | |
d51b70ff SW |
95 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
96 | rate_flags = ieee80211_chandef_rate_flags(chandef); | |
97 | shift = ieee80211_chandef_get_shift(chandef); | |
98 | rates_n = 0; | |
99 | if (have_higher_than_11mbit) | |
100 | *have_higher_than_11mbit = false; | |
101 | ||
2103dec1 SW |
102 | for (i = 0; i < sband->n_bitrates; i++) { |
103 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
104 | continue; | |
d51b70ff SW |
105 | if (sband->bitrates[i].bitrate > 110 && |
106 | have_higher_than_11mbit) | |
107 | *have_higher_than_11mbit = true; | |
2103dec1 SW |
108 | |
109 | rates |= BIT(i); | |
110 | rates_n++; | |
111 | } | |
112 | ||
46900298 | 113 | *pos++ = WLAN_EID_SUPP_RATES; |
2103dec1 SW |
114 | *pos++ = min_t(int, 8, rates_n); |
115 | for (ri = 0; ri < sband->n_bitrates; ri++) { | |
116 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
117 | 5 * (1 << shift)); | |
c3ffeab4 | 118 | u8 basic = 0; |
2103dec1 SW |
119 | if (!(rates & BIT(ri))) |
120 | continue; | |
121 | ||
122 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 123 | basic = 0x80; |
2103dec1 | 124 | *pos++ = basic | (u8) rate; |
93c75786 SW |
125 | if (++rates_added == 8) { |
126 | ri++; /* continue at next rate for EXT_SUPP_RATES */ | |
2103dec1 | 127 | break; |
93c75786 | 128 | } |
c3ffeab4 | 129 | } |
46900298 | 130 | |
57fbcce3 | 131 | if (sband->band == NL80211_BAND_2GHZ) { |
46900298 JB |
132 | *pos++ = WLAN_EID_DS_PARAMS; |
133 | *pos++ = 1; | |
d51b70ff SW |
134 | *pos++ = ieee80211_frequency_to_channel( |
135 | chandef->chan->center_freq); | |
46900298 JB |
136 | } |
137 | ||
46900298 JB |
138 | *pos++ = WLAN_EID_IBSS_PARAMS; |
139 | *pos++ = 2; | |
140 | /* FIX: set ATIM window based on scan results */ | |
141 | *pos++ = 0; | |
142 | *pos++ = 0; | |
143 | ||
cd7760e6 SW |
144 | if (csa_settings) { |
145 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
146 | *pos++ = 3; | |
147 | *pos++ = csa_settings->block_tx ? 1 : 0; | |
148 | *pos++ = ieee80211_frequency_to_channel( | |
149 | csa_settings->chandef.chan->center_freq); | |
af296bdb | 150 | presp->csa_counter_offsets[0] = (pos - presp->head); |
cd7760e6 | 151 | *pos++ = csa_settings->count; |
8df734e8 | 152 | presp->csa_current_counter = csa_settings->count; |
cd7760e6 SW |
153 | } |
154 | ||
2103dec1 SW |
155 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
156 | if (rates_n > 8) { | |
46900298 | 157 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
2103dec1 SW |
158 | *pos++ = rates_n - 8; |
159 | for (; ri < sband->n_bitrates; ri++) { | |
160 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
161 | 5 * (1 << shift)); | |
c3ffeab4 | 162 | u8 basic = 0; |
2103dec1 SW |
163 | if (!(rates & BIT(ri))) |
164 | continue; | |
165 | ||
166 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 167 | basic = 0x80; |
2103dec1 | 168 | *pos++ = basic | (u8) rate; |
c3ffeab4 | 169 | } |
46900298 JB |
170 | } |
171 | ||
c3ffeab4 JB |
172 | if (ifibss->ie_len) { |
173 | memcpy(pos, ifibss->ie, ifibss->ie_len); | |
174 | pos += ifibss->ie_len; | |
175 | } | |
af8cdcd8 | 176 | |
13c40c54 | 177 | /* add HT capability and information IEs */ |
d51b70ff SW |
178 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
179 | chandef->width != NL80211_CHAN_WIDTH_5 && | |
180 | chandef->width != NL80211_CHAN_WIDTH_10 && | |
683b6d3b | 181 | sband->ht_cap.ht_supported) { |
822854b0 SW |
182 | struct ieee80211_sta_ht_cap ht_cap; |
183 | ||
184 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
185 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
186 | ||
187 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
0d894ec5 AN |
188 | /* |
189 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection | |
190 | * field and RIFS Mode are reserved in IBSS mode, therefore | |
191 | * keep them at 0 | |
192 | */ | |
074d46d1 | 193 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
57f255f5 | 194 | chandef, 0, false); |
abcff6ef JD |
195 | |
196 | /* add VHT capability and information IEs */ | |
197 | if (chandef->width != NL80211_CHAN_WIDTH_20 && | |
198 | chandef->width != NL80211_CHAN_WIDTH_40 && | |
199 | sband->vht_cap.vht_supported) { | |
200 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
201 | sband->vht_cap.cap); | |
202 | pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap, | |
203 | chandef); | |
204 | } | |
13c40c54 AS |
205 | } |
206 | ||
40b861a0 AN |
207 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
208 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ | |
9eba6125 | 209 | |
c3ffeab4 JB |
210 | presp->head_len = pos - presp->head; |
211 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
212 | goto error; |
213 | ||
214 | return presp; | |
215 | error: | |
216 | kfree(presp); | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
221 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 222 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
223 | const u32 basic_rates, |
224 | const u16 capability, u64 tsf, | |
225 | bool creator) | |
226 | { | |
227 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
228 | struct ieee80211_local *local = sdata->local; | |
d51b70ff SW |
229 | struct ieee80211_mgmt *mgmt; |
230 | struct cfg80211_bss *bss; | |
231 | u32 bss_change; | |
232 | struct cfg80211_chan_def chandef; | |
b35c8097 | 233 | struct ieee80211_channel *chan; |
d51b70ff | 234 | struct beacon_data *presp; |
61f6bba0 | 235 | struct cfg80211_inform_bss bss_meta = {}; |
d51b70ff | 236 | bool have_higher_than_11mbit; |
2beb6dab | 237 | bool radar_required; |
55fff501 | 238 | int err; |
d51b70ff SW |
239 | |
240 | sdata_assert_lock(sdata); | |
241 | ||
242 | /* Reset own TSF to allow time synchronization work. */ | |
243 | drv_reset_tsf(local, sdata); | |
244 | ||
245 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
246 | sta_info_flush(sdata); | |
247 | ||
248 | /* if merging, indicate to driver that we leave the old IBSS */ | |
249 | if (sdata->vif.bss_conf.ibss_joined) { | |
250 | sdata->vif.bss_conf.ibss_joined = false; | |
251 | sdata->vif.bss_conf.ibss_creator = false; | |
252 | sdata->vif.bss_conf.enable_beacon = false; | |
253 | netif_carrier_off(sdata->dev); | |
254 | ieee80211_bss_info_change_notify(sdata, | |
255 | BSS_CHANGED_IBSS | | |
256 | BSS_CHANGED_BEACON_ENABLED); | |
55fff501 | 257 | drv_leave_ibss(local, sdata); |
d51b70ff SW |
258 | } |
259 | ||
260 | presp = rcu_dereference_protected(ifibss->presp, | |
261 | lockdep_is_held(&sdata->wdev.mtx)); | |
0c2bef46 | 262 | RCU_INIT_POINTER(ifibss->presp, NULL); |
d51b70ff SW |
263 | if (presp) |
264 | kfree_rcu(presp, rcu_head); | |
265 | ||
b35c8097 JL |
266 | /* make a copy of the chandef, it could be modified below. */ |
267 | chandef = *req_chandef; | |
268 | chan = chandef.chan; | |
174e0cd2 IP |
269 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
270 | NL80211_IFTYPE_ADHOC)) { | |
d51b70ff SW |
271 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
272 | chandef.width == NL80211_CHAN_WIDTH_10 || | |
273 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
274 | chandef.width == NL80211_CHAN_WIDTH_20) { | |
275 | sdata_info(sdata, | |
276 | "Failed to join IBSS, beacons forbidden\n"); | |
277 | return; | |
278 | } | |
279 | chandef.width = NL80211_CHAN_WIDTH_20; | |
280 | chandef.center_freq1 = chan->center_freq; | |
8e8d347d | 281 | /* check again for downgraded chandef */ |
174e0cd2 IP |
282 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
283 | NL80211_IFTYPE_ADHOC)) { | |
8e8d347d SW |
284 | sdata_info(sdata, |
285 | "Failed to join IBSS, beacons forbidden\n"); | |
286 | return; | |
287 | } | |
288 | } | |
289 | ||
290 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab | 291 | &chandef, NL80211_IFTYPE_ADHOC); |
6658ab80 LC |
292 | if (err < 0) { |
293 | sdata_info(sdata, | |
294 | "Failed to join IBSS, invalid chandef\n"); | |
295 | return; | |
296 | } | |
2beb6dab LC |
297 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
298 | sdata_info(sdata, | |
299 | "Failed to join IBSS, DFS channel without control program\n"); | |
300 | return; | |
d51b70ff SW |
301 | } |
302 | ||
2beb6dab LC |
303 | radar_required = err; |
304 | ||
34a3740d | 305 | mutex_lock(&local->mtx); |
d51b70ff SW |
306 | if (ieee80211_vif_use_channel(sdata, &chandef, |
307 | ifibss->fixed_channel ? | |
308 | IEEE80211_CHANCTX_SHARED : | |
309 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
310 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
34a3740d | 311 | mutex_unlock(&local->mtx); |
d51b70ff SW |
312 | return; |
313 | } | |
cc901de1 | 314 | sdata->radar_required = radar_required; |
34a3740d | 315 | mutex_unlock(&local->mtx); |
d51b70ff SW |
316 | |
317 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
318 | ||
d51b70ff SW |
319 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
320 | capability, tsf, &chandef, | |
cd7760e6 | 321 | &have_higher_than_11mbit, NULL); |
d51b70ff | 322 | if (!presp) |
c3ffeab4 JB |
323 | return; |
324 | ||
325 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 326 | mgmt = (void *)presp->head; |
46900298 | 327 | |
d6a83228 | 328 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 329 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 330 | sdata->vif.bss_conf.basic_rates = basic_rates; |
0ca54f6c MP |
331 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
332 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
333 | bss_change = BSS_CHANGED_BEACON_INT; |
334 | bss_change |= ieee80211_reset_erp_info(sdata); | |
335 | bss_change |= BSS_CHANGED_BSSID; | |
336 | bss_change |= BSS_CHANGED_BEACON; | |
337 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 338 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 339 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 340 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 341 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
342 | |
343 | /* | |
344 | * In 5 GHz/802.11a, we can always use short slot time. | |
345 | * (IEEE 802.11-2012 18.3.8.7) | |
346 | * | |
347 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
348 | * reasons. | |
349 | * (IEEE 802.11-2012 19.4.5) | |
350 | * | |
351 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
352 | */ | |
57fbcce3 | 353 | sdata->vif.bss_conf.use_short_slot = chan->band == NL80211_BAND_5GHZ; |
2f91a967 SW |
354 | bss_change |= BSS_CHANGED_ERP_SLOT; |
355 | ||
2ec9c1f6 | 356 | /* cf. IEEE 802.11 9.2.12 */ |
57fbcce3 | 357 | if (chan->band == NL80211_BAND_2GHZ && have_higher_than_11mbit) |
2ec9c1f6 SW |
358 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
359 | else | |
360 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
361 | ||
cec66283 | 362 | ieee80211_set_wmm_default(sdata, true, false); |
55fff501 | 363 | |
8fc214ba | 364 | sdata->vif.bss_conf.ibss_joined = true; |
c13a765b | 365 | sdata->vif.bss_conf.ibss_creator = creator; |
46900298 | 366 | |
55fff501 JB |
367 | err = drv_join_ibss(local, sdata); |
368 | if (err) { | |
369 | sdata->vif.bss_conf.ibss_joined = false; | |
370 | sdata->vif.bss_conf.ibss_creator = false; | |
371 | sdata->vif.bss_conf.enable_beacon = false; | |
372 | sdata->vif.bss_conf.ssid_len = 0; | |
373 | RCU_INIT_POINTER(ifibss->presp, NULL); | |
374 | kfree_rcu(presp, rcu_head); | |
34a3740d | 375 | mutex_lock(&local->mtx); |
55fff501 | 376 | ieee80211_vif_release_channel(sdata); |
34a3740d | 377 | mutex_unlock(&local->mtx); |
55fff501 JB |
378 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
379 | err); | |
380 | return; | |
381 | } | |
382 | ||
383 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 384 | |
46900298 | 385 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
386 | mod_timer(&ifibss->timer, |
387 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 388 | |
61f6bba0 JB |
389 | bss_meta.chan = chan; |
390 | bss_meta.scan_width = cfg80211_chandef_to_scan_width(&chandef); | |
391 | bss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, mgmt, | |
392 | presp->head_len, GFP_KERNEL); | |
393 | ||
5b112d3d | 394 | cfg80211_put_bss(local->hw.wiphy, bss); |
86a2ea41 | 395 | netif_carrier_on(sdata->dev); |
fe94f3a4 | 396 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
46900298 JB |
397 | } |
398 | ||
af8cdcd8 JB |
399 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
400 | struct ieee80211_bss *bss) | |
46900298 | 401 | { |
0c1ad2ca JB |
402 | struct cfg80211_bss *cbss = |
403 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 | 404 | struct ieee80211_supported_band *sband; |
75a423f4 | 405 | struct cfg80211_chan_def chandef; |
b59066a2 JB |
406 | u32 basic_rates; |
407 | int i, j; | |
0c1ad2ca | 408 | u16 beacon_int = cbss->beacon_interval; |
8cef2c9d | 409 | const struct cfg80211_bss_ies *ies; |
75a423f4 | 410 | enum nl80211_channel_type chan_type; |
8cef2c9d | 411 | u64 tsf; |
2103dec1 SW |
412 | u32 rate_flags; |
413 | int shift; | |
57c4d7b4 | 414 | |
8d61ffa5 | 415 | sdata_assert_lock(sdata); |
7a17a33c | 416 | |
57c4d7b4 JB |
417 | if (beacon_int < 10) |
418 | beacon_int = 10; | |
419 | ||
75a423f4 SW |
420 | switch (sdata->u.ibss.chandef.width) { |
421 | case NL80211_CHAN_WIDTH_20_NOHT: | |
422 | case NL80211_CHAN_WIDTH_20: | |
423 | case NL80211_CHAN_WIDTH_40: | |
424 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); | |
425 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); | |
426 | break; | |
427 | case NL80211_CHAN_WIDTH_5: | |
428 | case NL80211_CHAN_WIDTH_10: | |
429 | cfg80211_chandef_create(&chandef, cbss->channel, | |
a4ac6f2e | 430 | NL80211_CHAN_NO_HT); |
75a423f4 SW |
431 | chandef.width = sdata->u.ibss.chandef.width; |
432 | break; | |
abcff6ef | 433 | case NL80211_CHAN_WIDTH_80: |
c39b336d | 434 | case NL80211_CHAN_WIDTH_80P80: |
abcff6ef JD |
435 | case NL80211_CHAN_WIDTH_160: |
436 | chandef = sdata->u.ibss.chandef; | |
437 | chandef.chan = cbss->channel; | |
438 | break; | |
75a423f4 SW |
439 | default: |
440 | /* fall back to 20 MHz for unsupported modes */ | |
441 | cfg80211_chandef_create(&chandef, cbss->channel, | |
a4ac6f2e | 442 | NL80211_CHAN_NO_HT); |
75a423f4 SW |
443 | break; |
444 | } | |
445 | ||
0c1ad2ca | 446 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 SW |
447 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
448 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
b59066a2 JB |
449 | |
450 | basic_rates = 0; | |
451 | ||
452 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 453 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
454 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
455 | ||
456 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
457 | int brate; |
458 | if ((rate_flags & sband->bitrates[j].flags) | |
459 | != rate_flags) | |
460 | continue; | |
461 | ||
462 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, | |
463 | 5 * (1 << shift)); | |
464 | if (brate == rate) { | |
b59066a2 JB |
465 | if (is_basic) |
466 | basic_rates |= BIT(j); | |
467 | break; | |
468 | } | |
469 | } | |
470 | } | |
471 | ||
8cef2c9d JB |
472 | rcu_read_lock(); |
473 | ies = rcu_dereference(cbss->ies); | |
474 | tsf = ies->tsf; | |
475 | rcu_read_unlock(); | |
476 | ||
0c1ad2ca | 477 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 478 | beacon_int, |
75a423f4 | 479 | &chandef, |
b59066a2 | 480 | basic_rates, |
0c1ad2ca | 481 | cbss->capability, |
8cef2c9d | 482 | tsf, false); |
46900298 JB |
483 | } |
484 | ||
cd7760e6 SW |
485 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
486 | struct cfg80211_csa_settings *csa_settings) | |
487 | { | |
488 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
489 | struct beacon_data *presp, *old_presp; | |
490 | struct cfg80211_bss *cbss; | |
491 | const struct cfg80211_bss_ies *ies; | |
f181d6a3 | 492 | u16 capability = WLAN_CAPABILITY_IBSS; |
cd7760e6 SW |
493 | u64 tsf; |
494 | int ret = 0; | |
495 | ||
496 | sdata_assert_lock(sdata); | |
497 | ||
cd7760e6 | 498 | if (ifibss->privacy) |
f181d6a3 | 499 | capability |= WLAN_CAPABILITY_PRIVACY; |
cd7760e6 SW |
500 | |
501 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, | |
502 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
503 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
504 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
505 | |
506 | if (WARN_ON(!cbss)) { | |
507 | ret = -EINVAL; | |
508 | goto out; | |
509 | } | |
510 | ||
511 | rcu_read_lock(); | |
512 | ies = rcu_dereference(cbss->ies); | |
513 | tsf = ies->tsf; | |
514 | rcu_read_unlock(); | |
515 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
516 | ||
517 | old_presp = rcu_dereference_protected(ifibss->presp, | |
518 | lockdep_is_held(&sdata->wdev.mtx)); | |
519 | ||
520 | presp = ieee80211_ibss_build_presp(sdata, | |
521 | sdata->vif.bss_conf.beacon_int, | |
522 | sdata->vif.bss_conf.basic_rates, | |
523 | capability, tsf, &ifibss->chandef, | |
524 | NULL, csa_settings); | |
525 | if (!presp) { | |
526 | ret = -ENOMEM; | |
527 | goto out; | |
528 | } | |
529 | ||
530 | rcu_assign_pointer(ifibss->presp, presp); | |
531 | if (old_presp) | |
532 | kfree_rcu(old_presp, rcu_head); | |
533 | ||
dddd586b | 534 | return BSS_CHANGED_BEACON; |
cd7760e6 SW |
535 | out: |
536 | return ret; | |
537 | } | |
538 | ||
539 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) | |
540 | { | |
541 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
542 | struct cfg80211_bss *cbss; | |
faf046e7 | 543 | int err, changed = 0; |
cd7760e6 | 544 | |
bafdc614 SW |
545 | sdata_assert_lock(sdata); |
546 | ||
cd7760e6 SW |
547 | /* update cfg80211 bss information with the new channel */ |
548 | if (!is_zero_ether_addr(ifibss->bssid)) { | |
cd7760e6 SW |
549 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
550 | ifibss->chandef.chan, | |
551 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
552 | ifibss->ssid_len, |
553 | IEEE80211_BSS_TYPE_IBSS, | |
554 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
555 | /* XXX: should not really modify cfg80211 data */ |
556 | if (cbss) { | |
33787fc4 | 557 | cbss->channel = sdata->csa_chandef.chan; |
cd7760e6 SW |
558 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
559 | } | |
560 | } | |
561 | ||
33787fc4 | 562 | ifibss->chandef = sdata->csa_chandef; |
cd7760e6 SW |
563 | |
564 | /* generate the beacon */ | |
565 | err = ieee80211_ibss_csa_beacon(sdata, NULL); | |
cd7760e6 SW |
566 | if (err < 0) |
567 | return err; | |
568 | ||
faf046e7 | 569 | changed |= err; |
dddd586b | 570 | |
faf046e7 | 571 | return changed; |
cd7760e6 SW |
572 | } |
573 | ||
574 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) | |
575 | { | |
576 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
577 | ||
578 | cancel_work_sync(&ifibss->csa_connection_drop_work); | |
579 | } | |
580 | ||
52874a5e | 581 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
582 | __acquires(RCU) |
583 | { | |
584 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
585 | u8 addr[ETH_ALEN]; | |
586 | ||
587 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
588 | ||
bdcbd8e0 | 589 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 590 | |
83d5cc01 JB |
591 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
592 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
593 | /* authorize the station only if the network is not RSN protected. If |
594 | * not wait for the userspace to authorize it */ | |
595 | if (!sta->sdata->u.ibss.control_port) | |
596 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
597 | |
598 | rate_control_rate_init(sta); | |
599 | ||
600 | /* If it fails, maybe we raced another insertion? */ | |
601 | if (sta_info_insert_rcu(sta)) | |
602 | return sta_info_get(sdata, addr); | |
603 | return sta; | |
604 | } | |
605 | ||
606 | static struct sta_info * | |
52874a5e AQ |
607 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
608 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
609 | __acquires(RCU) |
610 | { | |
611 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
612 | struct ieee80211_local *local = sdata->local; | |
613 | struct sta_info *sta; | |
55de908a | 614 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 615 | struct ieee80211_supported_band *sband; |
74608aca | 616 | enum nl80211_bss_scan_width scan_width; |
55de908a | 617 | int band; |
8bf11d8d JB |
618 | |
619 | /* | |
620 | * XXX: Consider removing the least recently used entry and | |
621 | * allow new one to be added. | |
622 | */ | |
623 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 624 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 625 | sdata->name, addr); |
8bf11d8d JB |
626 | rcu_read_lock(); |
627 | return NULL; | |
628 | } | |
629 | ||
630 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
631 | rcu_read_lock(); | |
632 | return NULL; | |
633 | } | |
634 | ||
b203ca39 | 635 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
636 | rcu_read_lock(); |
637 | return NULL; | |
638 | } | |
639 | ||
55de908a JB |
640 | rcu_read_lock(); |
641 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
642 | if (WARN_ON_ONCE(!chanctx_conf)) | |
643 | return NULL; | |
4bf88530 | 644 | band = chanctx_conf->def.chan->band; |
74608aca | 645 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
646 | rcu_read_unlock(); |
647 | ||
8bf11d8d JB |
648 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
649 | if (!sta) { | |
650 | rcu_read_lock(); | |
651 | return NULL; | |
652 | } | |
653 | ||
8bf11d8d | 654 | /* make sure mandatory rates are always added */ |
b422c6cd | 655 | sband = local->hw.wiphy->bands[band]; |
8bf11d8d | 656 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 657 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 658 | |
52874a5e | 659 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
660 | } |
661 | ||
871a4180 SW |
662 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
663 | { | |
664 | struct ieee80211_local *local = sdata->local; | |
665 | int active = 0; | |
666 | struct sta_info *sta; | |
667 | ||
668 | sdata_assert_lock(sdata); | |
669 | ||
670 | rcu_read_lock(); | |
671 | ||
672 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
b8da6b6a JB |
673 | unsigned long last_active = ieee80211_sta_last_active(sta); |
674 | ||
871a4180 | 675 | if (sta->sdata == sdata && |
b8da6b6a JB |
676 | time_is_after_jiffies(last_active + |
677 | IEEE80211_IBSS_MERGE_INTERVAL)) { | |
871a4180 SW |
678 | active++; |
679 | break; | |
680 | } | |
681 | } | |
682 | ||
683 | rcu_read_unlock(); | |
684 | ||
685 | return active; | |
686 | } | |
687 | ||
688 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
689 | { | |
690 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
691 | struct ieee80211_local *local = sdata->local; | |
692 | struct cfg80211_bss *cbss; | |
693 | struct beacon_data *presp; | |
694 | struct sta_info *sta; | |
871a4180 | 695 | |
d4c80d9d | 696 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
697 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
698 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
699 | ifibss->ssid_len, |
700 | IEEE80211_BSS_TYPE_IBSS, | |
701 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
702 | |
703 | if (cbss) { | |
704 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
705 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
706 | } | |
707 | } | |
708 | ||
709 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
710 | ||
711 | sta_info_flush(sdata); | |
712 | ||
713 | spin_lock_bh(&ifibss->incomplete_lock); | |
714 | while (!list_empty(&ifibss->incomplete_stations)) { | |
715 | sta = list_first_entry(&ifibss->incomplete_stations, | |
716 | struct sta_info, list); | |
717 | list_del(&sta->list); | |
718 | spin_unlock_bh(&ifibss->incomplete_lock); | |
719 | ||
720 | sta_info_free(local, sta); | |
721 | spin_lock_bh(&ifibss->incomplete_lock); | |
722 | } | |
723 | spin_unlock_bh(&ifibss->incomplete_lock); | |
724 | ||
725 | netif_carrier_off(sdata->dev); | |
726 | ||
727 | sdata->vif.bss_conf.ibss_joined = false; | |
728 | sdata->vif.bss_conf.ibss_creator = false; | |
729 | sdata->vif.bss_conf.enable_beacon = false; | |
730 | sdata->vif.bss_conf.ssid_len = 0; | |
731 | ||
732 | /* remove beacon */ | |
733 | presp = rcu_dereference_protected(ifibss->presp, | |
734 | lockdep_is_held(&sdata->wdev.mtx)); | |
735 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); | |
736 | if (presp) | |
737 | kfree_rcu(presp, rcu_head); | |
738 | ||
739 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
740 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
741 | BSS_CHANGED_IBSS); | |
55fff501 | 742 | drv_leave_ibss(local, sdata); |
34a3740d | 743 | mutex_lock(&local->mtx); |
871a4180 | 744 | ieee80211_vif_release_channel(sdata); |
34a3740d | 745 | mutex_unlock(&local->mtx); |
871a4180 SW |
746 | } |
747 | ||
cd7760e6 SW |
748 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
749 | { | |
750 | struct ieee80211_sub_if_data *sdata = | |
751 | container_of(work, struct ieee80211_sub_if_data, | |
752 | u.ibss.csa_connection_drop_work); | |
753 | ||
6f07d216 LC |
754 | sdata_lock(sdata); |
755 | ||
cd7760e6 SW |
756 | ieee80211_ibss_disconnect(sdata); |
757 | synchronize_rcu(); | |
758 | skb_queue_purge(&sdata->skb_queue); | |
759 | ||
760 | /* trigger a scan to find another IBSS network to join */ | |
761 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
6f07d216 LC |
762 | |
763 | sdata_unlock(sdata); | |
cd7760e6 SW |
764 | } |
765 | ||
8e8d347d SW |
766 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
767 | { | |
768 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
769 | int err; | |
770 | ||
771 | /* if the current channel is a DFS channel, mark the channel as | |
772 | * unavailable. | |
773 | */ | |
774 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
775 | &ifibss->chandef, |
776 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
777 | if (err > 0) |
778 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
779 | GFP_ATOMIC); | |
780 | } | |
781 | ||
cd7760e6 SW |
782 | static bool |
783 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
784 | struct ieee802_11_elems *elems, | |
785 | bool beacon) | |
786 | { | |
787 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 788 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 789 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 790 | enum nl80211_channel_type ch_type; |
82a8e17d | 791 | int err; |
cd7760e6 | 792 | u32 sta_flags; |
cd7760e6 | 793 | |
dbd72850 MK |
794 | sdata_assert_lock(sdata); |
795 | ||
cd7760e6 SW |
796 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
797 | switch (ifibss->chandef.width) { | |
798 | case NL80211_CHAN_WIDTH_5: | |
799 | case NL80211_CHAN_WIDTH_10: | |
800 | case NL80211_CHAN_WIDTH_20_NOHT: | |
801 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
802 | /* fall through */ | |
803 | case NL80211_CHAN_WIDTH_20: | |
804 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
805 | break; | |
806 | default: | |
807 | break; | |
808 | } | |
809 | ||
810 | memset(¶ms, 0, sizeof(params)); | |
84469a45 | 811 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 812 | ifibss->chandef.chan->band, |
c0f17eb9 | 813 | sta_flags, ifibss->bssid, &csa_ie); |
cd7760e6 SW |
814 | /* can't switch to destination channel, fail */ |
815 | if (err < 0) | |
816 | goto disconnect; | |
817 | ||
818 | /* did not contain a CSA */ | |
819 | if (err) | |
820 | return false; | |
821 | ||
0834ae3c SW |
822 | /* channel switch is not supported, disconnect */ |
823 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
824 | goto disconnect; | |
825 | ||
c0f17eb9 CYY |
826 | params.count = csa_ie.count; |
827 | params.chandef = csa_ie.chandef; | |
828 | ||
cd7760e6 SW |
829 | switch (ifibss->chandef.width) { |
830 | case NL80211_CHAN_WIDTH_20_NOHT: | |
831 | case NL80211_CHAN_WIDTH_20: | |
832 | case NL80211_CHAN_WIDTH_40: | |
833 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
834 | * another mode has been announced. The mode is not adopted | |
835 | * within the beacon while doing CSA and we should therefore | |
836 | * keep the mode which we announce. | |
837 | */ | |
838 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
839 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
840 | ch_type); | |
841 | break; | |
842 | case NL80211_CHAN_WIDTH_5: | |
843 | case NL80211_CHAN_WIDTH_10: | |
844 | if (params.chandef.width != ifibss->chandef.width) { | |
845 | sdata_info(sdata, | |
846 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
847 | ifibss->bssid, | |
848 | params.chandef.chan->center_freq, | |
849 | params.chandef.width, | |
850 | params.chandef.center_freq1, | |
851 | params.chandef.center_freq2); | |
852 | goto disconnect; | |
853 | } | |
854 | break; | |
855 | default: | |
856 | /* should not happen, sta_flags should prevent VHT modes. */ | |
857 | WARN_ON(1); | |
858 | goto disconnect; | |
859 | } | |
860 | ||
174e0cd2 IP |
861 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
862 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
863 | sdata_info(sdata, |
864 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
865 | ifibss->bssid, | |
866 | params.chandef.chan->center_freq, | |
867 | params.chandef.width, | |
868 | params.chandef.center_freq1, | |
869 | params.chandef.center_freq2); | |
870 | goto disconnect; | |
871 | } | |
872 | ||
873 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
874 | ¶ms.chandef, |
875 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
876 | if (err < 0) |
877 | goto disconnect; | |
2beb6dab | 878 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 879 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 880 | goto disconnect; |
cd7760e6 SW |
881 | } |
882 | ||
2beb6dab LC |
883 | params.radar_required = err; |
884 | ||
82a8e17d LC |
885 | if (cfg80211_chandef_identical(¶ms.chandef, |
886 | &sdata->vif.bss_conf.chandef)) { | |
887 | ibss_dbg(sdata, | |
888 | "received csa with an identical chandef, ignoring\n"); | |
889 | return true; | |
cd7760e6 | 890 | } |
cd7760e6 SW |
891 | |
892 | /* all checks done, now perform the channel switch. */ | |
893 | ibss_dbg(sdata, | |
894 | "received channel switch announcement to go to channel %d MHz\n", | |
895 | params.chandef.chan->center_freq); | |
896 | ||
c0f17eb9 | 897 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 898 | |
82a8e17d LC |
899 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
900 | ¶ms)) | |
901 | goto disconnect; | |
cd7760e6 | 902 | |
8e8d347d SW |
903 | ieee80211_ibss_csa_mark_radar(sdata); |
904 | ||
cd7760e6 SW |
905 | return true; |
906 | disconnect: | |
907 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
908 | ieee80211_queue_work(&sdata->local->hw, | |
909 | &ifibss->csa_connection_drop_work); | |
910 | ||
8e8d347d SW |
911 | ieee80211_ibss_csa_mark_radar(sdata); |
912 | ||
cd7760e6 SW |
913 | return true; |
914 | } | |
915 | ||
916 | static void | |
917 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
918 | struct ieee80211_mgmt *mgmt, size_t len, | |
919 | struct ieee80211_rx_status *rx_status, | |
920 | struct ieee802_11_elems *elems) | |
921 | { | |
922 | int required_len; | |
923 | ||
924 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
925 | return; | |
926 | ||
927 | /* CSA is the only action we handle for now */ | |
928 | if (mgmt->u.action.u.measurement.action_code != | |
929 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
930 | return; | |
931 | ||
932 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
933 | sizeof(mgmt->u.action.u.chan_switch); | |
934 | if (len < required_len) | |
935 | return; | |
936 | ||
82a8e17d LC |
937 | if (!sdata->vif.csa_active) |
938 | ieee80211_ibss_process_chanswitch(sdata, elems, false); | |
cd7760e6 SW |
939 | } |
940 | ||
2cc59e78 AQ |
941 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
942 | struct ieee80211_mgmt *mgmt, | |
943 | size_t len) | |
944 | { | |
945 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
946 | ||
947 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
948 | return; | |
949 | ||
c6e57b38 EG |
950 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
951 | ibss_dbg(sdata, "\tBSSID=%pM (reason: %d)\n", mgmt->bssid, reason); | |
2cc59e78 AQ |
952 | sta_info_destroy_addr(sdata, mgmt->sa); |
953 | } | |
954 | ||
6d810f10 AQ |
955 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
956 | struct ieee80211_mgmt *mgmt, | |
957 | size_t len) | |
958 | { | |
959 | u16 auth_alg, auth_transaction; | |
960 | ||
8d61ffa5 | 961 | sdata_assert_lock(sdata); |
6d810f10 AQ |
962 | |
963 | if (len < 24 + 6) | |
964 | return; | |
965 | ||
966 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
967 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
968 | ||
c6e57b38 EG |
969 | ibss_dbg(sdata, "RX Auth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
970 | ibss_dbg(sdata, "\tBSSID=%pM (auth_transaction=%d)\n", | |
971 | mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
972 | |
973 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
974 | return; | |
975 | ||
6d810f10 AQ |
976 | /* |
977 | * IEEE 802.11 standard does not require authentication in IBSS | |
978 | * networks and most implementations do not seem to use it. | |
979 | * However, try to reply to authentication attempts if someone | |
980 | * has actually implemented this. | |
981 | */ | |
700e8ea6 | 982 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 983 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
984 | } |
985 | ||
8a4988d1 JD |
986 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
987 | struct ieee80211_mgmt *mgmt, size_t len, | |
988 | struct ieee80211_rx_status *rx_status, | |
989 | struct ieee802_11_elems *elems, | |
990 | struct ieee80211_channel *channel) | |
46900298 | 991 | { |
46900298 | 992 | struct sta_info *sta; |
57fbcce3 | 993 | enum nl80211_band band = rx_status->band; |
74608aca | 994 | enum nl80211_bss_scan_width scan_width; |
8a4988d1 | 995 | struct ieee80211_local *local = sdata->local; |
21a8e9dd | 996 | struct ieee80211_supported_band *sband; |
13c40c54 | 997 | bool rates_updated = false; |
8a4988d1 | 998 | u32 supp_rates = 0; |
46900298 | 999 | |
8a4988d1 | 1000 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
1001 | return; |
1002 | ||
8a4988d1 JD |
1003 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
1004 | return; | |
46900298 | 1005 | |
21a8e9dd MSS |
1006 | sband = local->hw.wiphy->bands[band]; |
1007 | if (WARN_ON(!sband)) | |
1008 | return; | |
1009 | ||
8a4988d1 JD |
1010 | rcu_read_lock(); |
1011 | sta = sta_info_get(sdata, mgmt->sa); | |
1012 | ||
1013 | if (elems->supp_rates) { | |
1014 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
1015 | band, NULL); | |
1016 | if (sta) { | |
1017 | u32 prev_rates; | |
1018 | ||
1019 | prev_rates = sta->sta.supp_rates[band]; | |
1020 | /* make sure mandatory rates are always added */ | |
1021 | scan_width = NL80211_BSS_CHAN_WIDTH_20; | |
da6a4352 | 1022 | if (rx_status->bw == RATE_INFO_BW_5) |
8a4988d1 | 1023 | scan_width = NL80211_BSS_CHAN_WIDTH_5; |
da6a4352 | 1024 | else if (rx_status->bw == RATE_INFO_BW_10) |
8a4988d1 JD |
1025 | scan_width = NL80211_BSS_CHAN_WIDTH_10; |
1026 | ||
1027 | sta->sta.supp_rates[band] = supp_rates | | |
1028 | ieee80211_mandatory_rates(sband, scan_width); | |
1029 | if (sta->sta.supp_rates[band] != prev_rates) { | |
1030 | ibss_dbg(sdata, | |
1031 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1032 | sta->sta.addr, prev_rates, | |
1033 | sta->sta.supp_rates[band]); | |
1034 | rates_updated = true; | |
8bf11d8d | 1035 | } |
8a4988d1 JD |
1036 | } else { |
1037 | rcu_read_unlock(); | |
1038 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1039 | mgmt->sa, supp_rates); | |
34e89507 | 1040 | } |
8a4988d1 | 1041 | } |
9eba6125 | 1042 | |
96a4688e JB |
1043 | if (sta && !sta->sta.wme && |
1044 | elems->wmm_info && local->hw.queues >= IEEE80211_NUM_ACS) { | |
8a4988d1 | 1045 | sta->sta.wme = true; |
96a4688e JB |
1046 | ieee80211_check_fast_xmit(sta); |
1047 | } | |
13c40c54 | 1048 | |
8a4988d1 JD |
1049 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1050 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1051 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1052 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1053 | /* we both use HT */ | |
1054 | struct ieee80211_ht_cap htcap_ie; | |
1055 | struct cfg80211_chan_def chandef; | |
abcff6ef | 1056 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth; |
d2954457 | 1057 | |
8ac3c704 JB |
1058 | cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); |
1059 | ieee80211_chandef_ht_oper(elems->ht_operation, &chandef); | |
d2954457 | 1060 | |
8a4988d1 | 1061 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
8a4988d1 JD |
1062 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
1063 | &htcap_ie, | |
1064 | sta); | |
abcff6ef JD |
1065 | |
1066 | if (elems->vht_operation && elems->vht_cap_elem && | |
1067 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && | |
1068 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { | |
1069 | /* we both use VHT */ | |
1070 | struct ieee80211_vht_cap cap_ie; | |
1071 | struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap; | |
1072 | ||
8ac3c704 JB |
1073 | ieee80211_chandef_vht_oper(elems->vht_operation, |
1074 | &chandef); | |
abcff6ef JD |
1075 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); |
1076 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
1077 | &cap_ie, sta); | |
1078 | if (memcmp(&cap, &sta->sta.vht_cap, sizeof(cap))) | |
1079 | rates_updated |= true; | |
13c40c54 AS |
1080 | } |
1081 | ||
abcff6ef JD |
1082 | if (bw != sta->sta.bandwidth) |
1083 | rates_updated |= true; | |
d2954457 | 1084 | |
abcff6ef JD |
1085 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
1086 | &chandef)) | |
1087 | WARN_ON_ONCE(1); | |
8a4988d1 | 1088 | } |
d2954457 | 1089 | |
8a4988d1 JD |
1090 | if (sta && rates_updated) { |
1091 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
1092 | u8 rx_nss = sta->sta.rx_nss; | |
13c40c54 | 1093 | |
8a4988d1 JD |
1094 | /* Force rx_nss recalculation */ |
1095 | sta->sta.rx_nss = 0; | |
1096 | rate_control_rate_init(sta); | |
1097 | if (sta->sta.rx_nss != rx_nss) | |
1098 | changed |= IEEE80211_RC_NSS_CHANGED; | |
13c40c54 | 1099 | |
8a4988d1 | 1100 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1101 | } |
1102 | ||
8a4988d1 JD |
1103 | rcu_read_unlock(); |
1104 | } | |
1105 | ||
1106 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1107 | struct ieee80211_mgmt *mgmt, size_t len, | |
1108 | struct ieee80211_rx_status *rx_status, | |
1109 | struct ieee802_11_elems *elems) | |
1110 | { | |
1111 | struct ieee80211_local *local = sdata->local; | |
1112 | struct cfg80211_bss *cbss; | |
1113 | struct ieee80211_bss *bss; | |
1114 | struct ieee80211_channel *channel; | |
1115 | u64 beacon_timestamp, rx_timestamp; | |
1116 | u32 supp_rates = 0; | |
57fbcce3 | 1117 | enum nl80211_band band = rx_status->band; |
8a4988d1 JD |
1118 | |
1119 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1120 | if (!channel) | |
1121 | return; | |
1122 | ||
1123 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1124 | ||
46900298 | 1125 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
d45c4172 | 1126 | channel); |
46900298 JB |
1127 | if (!bss) |
1128 | return; | |
1129 | ||
0c1ad2ca JB |
1130 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1131 | ||
8cef2c9d JB |
1132 | /* same for beacon and probe response */ |
1133 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1134 | |
1135 | /* check if we need to merge IBSS */ | |
1136 | ||
46900298 | 1137 | /* not an IBSS */ |
0c1ad2ca | 1138 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1139 | goto put_bss; |
1140 | ||
1141 | /* different channel */ | |
55de908a | 1142 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1143 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1144 | goto put_bss; |
1145 | ||
1146 | /* different SSID */ | |
1147 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1148 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1149 | sdata->u.ibss.ssid_len)) | |
1150 | goto put_bss; | |
1151 | ||
cd7760e6 | 1152 | /* process channel switch */ |
82a8e17d LC |
1153 | if (sdata->vif.csa_active || |
1154 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) | |
cd7760e6 SW |
1155 | goto put_bss; |
1156 | ||
34e8f082 | 1157 | /* same BSSID */ |
b203ca39 | 1158 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1159 | goto put_bss; |
1160 | ||
cd7760e6 SW |
1161 | /* we use a fixed BSSID */ |
1162 | if (sdata->u.ibss.fixed_bssid) | |
1163 | goto put_bss; | |
1164 | ||
f4bda337 TP |
1165 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1166 | /* time when timestamp field was received */ | |
1167 | rx_timestamp = | |
1168 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1169 | len + FCS_LEN, 24); | |
24487981 JB |
1170 | } else { |
1171 | /* | |
1172 | * second best option: get current TSF | |
1173 | * (will return -1 if not supported) | |
1174 | */ | |
37a41b4a | 1175 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1176 | } |
46900298 | 1177 | |
c6e57b38 | 1178 | ibss_dbg(sdata, "RX beacon SA=%pM BSSID=%pM TSF=0x%llx\n", |
bdcbd8e0 | 1179 | mgmt->sa, mgmt->bssid, |
c6e57b38 EG |
1180 | (unsigned long long)rx_timestamp); |
1181 | ibss_dbg(sdata, "\tBCN=0x%llx diff=%lld @%lu\n", | |
bdcbd8e0 JB |
1182 | (unsigned long long)beacon_timestamp, |
1183 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1184 | jiffies); | |
46900298 JB |
1185 | |
1186 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1187 | ibss_dbg(sdata, |
1188 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1189 | mgmt->bssid); | |
46900298 | 1190 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1191 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1192 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1193 | supp_rates); |
8bf11d8d | 1194 | rcu_read_unlock(); |
46900298 JB |
1195 | } |
1196 | ||
1197 | put_bss: | |
1198 | ieee80211_rx_bss_put(local, bss); | |
1199 | } | |
1200 | ||
8bf11d8d JB |
1201 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1202 | const u8 *bssid, const u8 *addr, | |
1203 | u32 supp_rates) | |
46900298 | 1204 | { |
2e10d330 | 1205 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1206 | struct ieee80211_local *local = sdata->local; |
1207 | struct sta_info *sta; | |
55de908a | 1208 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1209 | struct ieee80211_supported_band *sband; |
74608aca | 1210 | enum nl80211_bss_scan_width scan_width; |
55de908a | 1211 | int band; |
46900298 | 1212 | |
af8cdcd8 JB |
1213 | /* |
1214 | * XXX: Consider removing the least recently used entry and | |
1215 | * allow new one to be added. | |
1216 | */ | |
46900298 | 1217 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1218 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1219 | sdata->name, addr); |
8bf11d8d | 1220 | return; |
46900298 JB |
1221 | } |
1222 | ||
2e10d330 | 1223 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1224 | return; |
2e10d330 | 1225 | |
b203ca39 | 1226 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1227 | return; |
46900298 | 1228 | |
55de908a JB |
1229 | rcu_read_lock(); |
1230 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1231 | if (WARN_ON_ONCE(!chanctx_conf)) { | |
1232 | rcu_read_unlock(); | |
1233 | return; | |
1234 | } | |
4bf88530 | 1235 | band = chanctx_conf->def.chan->band; |
74608aca | 1236 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
1237 | rcu_read_unlock(); |
1238 | ||
8bf11d8d | 1239 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1240 | if (!sta) |
8bf11d8d | 1241 | return; |
46900298 | 1242 | |
46900298 | 1243 | /* make sure mandatory rates are always added */ |
b422c6cd | 1244 | sband = local->hw.wiphy->bands[band]; |
46900298 | 1245 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 1246 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 1247 | |
8bf11d8d JB |
1248 | spin_lock(&ifibss->incomplete_lock); |
1249 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1250 | spin_unlock(&ifibss->incomplete_lock); | |
1251 | ieee80211_queue_work(&local->hw, &sdata->work); | |
46900298 JB |
1252 | } |
1253 | ||
dad9defd AQ |
1254 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1255 | { | |
1256 | struct ieee80211_local *local = sdata->local; | |
1257 | struct sta_info *sta, *tmp; | |
1258 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
e5a9f8d0 | 1259 | unsigned long exp_rsn = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
dad9defd AQ |
1260 | |
1261 | mutex_lock(&local->sta_mtx); | |
1262 | ||
1263 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
b8da6b6a JB |
1264 | unsigned long last_active = ieee80211_sta_last_active(sta); |
1265 | ||
dad9defd AQ |
1266 | if (sdata != sta->sdata) |
1267 | continue; | |
1268 | ||
b8da6b6a JB |
1269 | if (time_is_before_jiffies(last_active + exp_time) || |
1270 | (time_is_before_jiffies(last_active + exp_rsn) && | |
dad9defd AQ |
1271 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
1272 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", | |
1273 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1274 | "not authorized " : "", sta->sta.addr); | |
1275 | ||
1276 | WARN_ON(__sta_info_destroy(sta)); | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | mutex_unlock(&local->sta_mtx); | |
1281 | } | |
1282 | ||
ce9058ae BP |
1283 | /* |
1284 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1285 | */ | |
46900298 JB |
1286 | |
1287 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1288 | { | |
1289 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 1290 | enum nl80211_bss_scan_width scan_width; |
46900298 | 1291 | |
8d61ffa5 | 1292 | sdata_assert_lock(sdata); |
7a17a33c | 1293 | |
af8cdcd8 JB |
1294 | mod_timer(&ifibss->timer, |
1295 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1296 | |
dad9defd | 1297 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1298 | |
450aae3d S |
1299 | if (time_before(jiffies, ifibss->last_scan_completed + |
1300 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1301 | return; | |
1302 | ||
46900298 JB |
1303 | if (ieee80211_sta_active_ibss(sdata)) |
1304 | return; | |
1305 | ||
c037b836 | 1306 | if (ifibss->fixed_channel) |
46900298 JB |
1307 | return; |
1308 | ||
bdcbd8e0 JB |
1309 | sdata_info(sdata, |
1310 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1311 | |
7ca15a0a | 1312 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1313 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
76bed0f4 | 1314 | NULL, 0, scan_width); |
46900298 JB |
1315 | } |
1316 | ||
af8cdcd8 | 1317 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1318 | { |
1319 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1320 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1321 | u16 capability; |
1322 | int i; | |
1323 | ||
8d61ffa5 | 1324 | sdata_assert_lock(sdata); |
7a17a33c | 1325 | |
af8cdcd8 | 1326 | if (ifibss->fixed_bssid) { |
46900298 JB |
1327 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1328 | } else { | |
1329 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1330 | * own MAC address to make sure that devices that do not have proper | |
1331 | * random number generator get different BSSID. */ | |
1332 | get_random_bytes(bssid, ETH_ALEN); | |
1333 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1334 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1335 | bssid[0] &= ~0x01; |
1336 | bssid[0] |= 0x02; | |
1337 | } | |
1338 | ||
bdcbd8e0 | 1339 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1340 | |
46900298 JB |
1341 | capability = WLAN_CAPABILITY_IBSS; |
1342 | ||
fffd0934 | 1343 | if (ifibss->privacy) |
46900298 | 1344 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1345 | |
57c4d7b4 | 1346 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1347 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1348 | capability, 0, true); |
46900298 JB |
1349 | } |
1350 | ||
76bed0f4 JD |
1351 | static unsigned ibss_setup_channels(struct wiphy *wiphy, |
1352 | struct ieee80211_channel **channels, | |
1353 | unsigned int channels_max, | |
1354 | u32 center_freq, u32 width) | |
1355 | { | |
1356 | struct ieee80211_channel *chan = NULL; | |
1357 | unsigned int n_chan = 0; | |
1358 | u32 start_freq, end_freq, freq; | |
1359 | ||
1360 | if (width <= 20) { | |
1361 | start_freq = center_freq; | |
1362 | end_freq = center_freq; | |
1363 | } else { | |
1364 | start_freq = center_freq - width / 2 + 10; | |
1365 | end_freq = center_freq + width / 2 - 10; | |
1366 | } | |
1367 | ||
1368 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1369 | chan = ieee80211_get_channel(wiphy, freq); | |
1370 | if (!chan) | |
1371 | continue; | |
1372 | if (n_chan >= channels_max) | |
1373 | return n_chan; | |
1374 | ||
1375 | channels[n_chan] = chan; | |
1376 | n_chan++; | |
1377 | } | |
1378 | ||
1379 | return n_chan; | |
1380 | } | |
1381 | ||
1382 | static unsigned int | |
1383 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1384 | const struct cfg80211_chan_def *chandef, | |
1385 | struct ieee80211_channel **channels, | |
1386 | unsigned int channels_max) | |
1387 | { | |
1388 | unsigned int n_chan = 0; | |
1389 | u32 width, cf1, cf2 = 0; | |
1390 | ||
1391 | switch (chandef->width) { | |
1392 | case NL80211_CHAN_WIDTH_40: | |
1393 | width = 40; | |
1394 | break; | |
1395 | case NL80211_CHAN_WIDTH_80P80: | |
1396 | cf2 = chandef->center_freq2; | |
1397 | /* fall through */ | |
1398 | case NL80211_CHAN_WIDTH_80: | |
1399 | width = 80; | |
1400 | break; | |
1401 | case NL80211_CHAN_WIDTH_160: | |
1402 | width = 160; | |
1403 | break; | |
1404 | default: | |
1405 | width = 20; | |
1406 | break; | |
1407 | } | |
1408 | ||
1409 | cf1 = chandef->center_freq1; | |
1410 | ||
1411 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1412 | ||
1413 | if (cf2) | |
1414 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1415 | channels_max - n_chan, cf2, | |
1416 | width); | |
1417 | ||
1418 | return n_chan; | |
1419 | } | |
1420 | ||
ce9058ae BP |
1421 | /* |
1422 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1423 | */ | |
1424 | ||
af8cdcd8 | 1425 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1426 | { |
1427 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1428 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1429 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1430 | struct ieee80211_channel *chan = NULL; |
46900298 | 1431 | const u8 *bssid = NULL; |
7ca15a0a | 1432 | enum nl80211_bss_scan_width scan_width; |
46900298 JB |
1433 | int active_ibss; |
1434 | ||
8d61ffa5 | 1435 | sdata_assert_lock(sdata); |
7a17a33c | 1436 | |
46900298 | 1437 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1438 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1439 | |
1440 | if (active_ibss) | |
af8cdcd8 | 1441 | return; |
46900298 | 1442 | |
af8cdcd8 JB |
1443 | if (ifibss->fixed_bssid) |
1444 | bssid = ifibss->bssid; | |
1445 | if (ifibss->fixed_channel) | |
3aede78a | 1446 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1447 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1448 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1449 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1450 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1451 | IEEE80211_BSS_TYPE_IBSS, |
1452 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1453 | |
1454 | if (cbss) { | |
1455 | struct ieee80211_bss *bss; | |
46900298 | 1456 | |
0c1ad2ca | 1457 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1458 | ibss_dbg(sdata, |
1459 | "sta_find_ibss: selected %pM current %pM\n", | |
1460 | cbss->bssid, ifibss->bssid); | |
1461 | sdata_info(sdata, | |
1462 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1463 | cbss->bssid); | |
46900298 | 1464 | |
af8cdcd8 | 1465 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1466 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1467 | return; |
d419b9f0 | 1468 | } |
46900298 | 1469 | |
d8eb741e AQ |
1470 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1471 | * directly and do not waste time scanning | |
1472 | */ | |
1473 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1474 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1475 | bssid); | |
1476 | ieee80211_sta_create_ibss(sdata); | |
1477 | return; | |
1478 | } | |
1479 | ||
1480 | ||
bdcbd8e0 | 1481 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1482 | |
1483 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1484 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1485 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1486 | struct ieee80211_channel *channels[8]; |
1487 | unsigned int num; | |
1488 | ||
bdcbd8e0 | 1489 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1490 | |
7ca15a0a | 1491 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
d321cd01 SS |
1492 | |
1493 | if (ifibss->fixed_channel) { | |
1494 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, | |
1495 | &ifibss->chandef, | |
1496 | channels, | |
1497 | ARRAY_SIZE(channels)); | |
1498 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1499 | ifibss->ssid_len, channels, | |
1500 | num, scan_width); | |
1501 | } else { | |
1502 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1503 | ifibss->ssid_len, NULL, | |
1504 | 0, scan_width); | |
1505 | } | |
ce9058ae | 1506 | } else { |
46900298 JB |
1507 | int interval = IEEE80211_SCAN_INTERVAL; |
1508 | ||
1509 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1510 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1511 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1512 | |
af8cdcd8 JB |
1513 | mod_timer(&ifibss->timer, |
1514 | round_jiffies(jiffies + interval)); | |
46900298 | 1515 | } |
46900298 JB |
1516 | } |
1517 | ||
1518 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1519 | struct sk_buff *req) |
46900298 | 1520 | { |
c269a203 | 1521 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1522 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1523 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1524 | int tx_last_beacon, len = req->len; |
46900298 | 1525 | struct sk_buff *skb; |
c3ffeab4 | 1526 | struct beacon_data *presp; |
46900298 JB |
1527 | u8 *pos, *end; |
1528 | ||
8d61ffa5 | 1529 | sdata_assert_lock(sdata); |
7a17a33c | 1530 | |
40b275b6 | 1531 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1532 | lockdep_is_held(&sdata->wdev.mtx)); |
40b275b6 | 1533 | |
46900298 | 1534 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1535 | len < 24 + 2 || !presp) |
46900298 JB |
1536 | return; |
1537 | ||
24487981 | 1538 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1539 | |
c6e57b38 EG |
1540 | ibss_dbg(sdata, "RX ProbeReq SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
1541 | ibss_dbg(sdata, "\tBSSID=%pM (tx_last_beacon=%d)\n", | |
1542 | mgmt->bssid, tx_last_beacon); | |
46900298 | 1543 | |
1ed76487 | 1544 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1545 | return; |
1546 | ||
b203ca39 | 1547 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1548 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1549 | return; |
1550 | ||
1551 | end = ((u8 *) mgmt) + len; | |
1552 | pos = mgmt->u.probe_req.variable; | |
1553 | if (pos[0] != WLAN_EID_SSID || | |
1554 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1555 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1556 | mgmt->sa); | |
46900298 JB |
1557 | return; |
1558 | } | |
1559 | if (pos[1] != 0 && | |
1560 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1561 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1562 | /* Ignore ProbeReq for foreign SSID */ |
1563 | return; | |
1564 | } | |
1565 | ||
1566 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1567 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1568 | if (!skb) |
1569 | return; | |
1570 | ||
c3ffeab4 | 1571 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 1572 | skb_put_data(skb, presp->head, presp->head_len); |
c3ffeab4 JB |
1573 | |
1574 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1575 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1576 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1577 | |
1578 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1579 | if (pos[1] == 0) | |
1580 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1581 | ||
62ae67be | 1582 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1583 | } |
1584 | ||
d45c4172 EG |
1585 | static |
1586 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1587 | struct ieee80211_mgmt *mgmt, size_t len, | |
1588 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1589 | { |
1590 | size_t baselen; | |
1591 | struct ieee802_11_elems elems; | |
1592 | ||
d45c4172 EG |
1593 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1594 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1595 | ||
1596 | /* | |
1597 | * either beacon or probe_resp but the variable field is at the | |
1598 | * same offset | |
1599 | */ | |
46900298 JB |
1600 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1601 | if (baselen > len) | |
1602 | return; | |
1603 | ||
1604 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1605 | false, &elems); |
46900298 | 1606 | |
d45c4172 | 1607 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
46900298 JB |
1608 | } |
1609 | ||
1fa57d01 JB |
1610 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1611 | struct sk_buff *skb) | |
46900298 JB |
1612 | { |
1613 | struct ieee80211_rx_status *rx_status; | |
1614 | struct ieee80211_mgmt *mgmt; | |
1615 | u16 fc; | |
cd7760e6 SW |
1616 | struct ieee802_11_elems elems; |
1617 | int ies_len; | |
46900298 | 1618 | |
f1d58c25 | 1619 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1620 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1621 | fc = le16_to_cpu(mgmt->frame_control); | |
1622 | ||
8d61ffa5 | 1623 | sdata_lock(sdata); |
7a17a33c | 1624 | |
c926d006 TH |
1625 | if (!sdata->u.ibss.ssid_len) |
1626 | goto mgmt_out; /* not ready to merge yet */ | |
1627 | ||
46900298 JB |
1628 | switch (fc & IEEE80211_FCTL_STYPE) { |
1629 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1630 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1631 | break; |
1632 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1633 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1634 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1635 | rx_status); | |
46900298 JB |
1636 | break; |
1637 | case IEEE80211_STYPE_AUTH: | |
1638 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1639 | break; | |
2cc59e78 AQ |
1640 | case IEEE80211_STYPE_DEAUTH: |
1641 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1642 | break; | |
cd7760e6 SW |
1643 | case IEEE80211_STYPE_ACTION: |
1644 | switch (mgmt->u.action.category) { | |
1645 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1646 | ies_len = skb->len - | |
1647 | offsetof(struct ieee80211_mgmt, | |
1648 | u.action.u.chan_switch.variable); | |
1649 | ||
1650 | if (ies_len < 0) | |
1651 | break; | |
1652 | ||
1653 | ieee802_11_parse_elems( | |
1654 | mgmt->u.action.u.chan_switch.variable, | |
1655 | ies_len, true, &elems); | |
1656 | ||
1657 | if (elems.parse_error) | |
1658 | break; | |
1659 | ||
1660 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, | |
1661 | rx_status, &elems); | |
1662 | break; | |
1663 | } | |
46900298 | 1664 | } |
7a17a33c | 1665 | |
c926d006 | 1666 | mgmt_out: |
8d61ffa5 | 1667 | sdata_unlock(sdata); |
46900298 JB |
1668 | } |
1669 | ||
1fa57d01 | 1670 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1671 | { |
1fa57d01 | 1672 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1673 | struct sta_info *sta; |
46900298 | 1674 | |
8d61ffa5 | 1675 | sdata_lock(sdata); |
7a17a33c JB |
1676 | |
1677 | /* | |
1678 | * Work could be scheduled after scan or similar | |
1679 | * when we aren't even joined (or trying) with a | |
1680 | * network. | |
1681 | */ | |
1682 | if (!ifibss->ssid_len) | |
1683 | goto out; | |
46900298 | 1684 | |
8bf11d8d JB |
1685 | spin_lock_bh(&ifibss->incomplete_lock); |
1686 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1687 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1688 | struct sta_info, list); | |
1689 | list_del(&sta->list); | |
1690 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1691 | ||
52874a5e | 1692 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1693 | rcu_read_unlock(); |
1694 | spin_lock_bh(&ifibss->incomplete_lock); | |
1695 | } | |
1696 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1697 | ||
46900298 JB |
1698 | switch (ifibss->state) { |
1699 | case IEEE80211_IBSS_MLME_SEARCH: | |
1700 | ieee80211_sta_find_ibss(sdata); | |
1701 | break; | |
1702 | case IEEE80211_IBSS_MLME_JOINED: | |
1703 | ieee80211_sta_merge_ibss(sdata); | |
1704 | break; | |
1705 | default: | |
1706 | WARN_ON(1); | |
1707 | break; | |
1708 | } | |
46900298 | 1709 | |
7a17a33c | 1710 | out: |
8d61ffa5 | 1711 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1712 | } |
1713 | ||
34f11cd3 | 1714 | static void ieee80211_ibss_timer(struct timer_list *t) |
46900298 JB |
1715 | { |
1716 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 1717 | from_timer(sdata, t, u.ibss.timer); |
5bb644a0 | 1718 | |
a6182943 | 1719 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
5bb644a0 | 1720 | } |
5bb644a0 | 1721 | |
46900298 JB |
1722 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1723 | { | |
1724 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1725 | ||
34f11cd3 | 1726 | timer_setup(&ifibss->timer, ieee80211_ibss_timer, 0); |
8bf11d8d JB |
1727 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1728 | spin_lock_init(&ifibss->incomplete_lock); | |
cd7760e6 SW |
1729 | INIT_WORK(&ifibss->csa_connection_drop_work, |
1730 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1731 | } |
1732 | ||
1733 | /* scan finished notification */ | |
1734 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1735 | { | |
af8cdcd8 | 1736 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1737 | |
29b4a4f7 JB |
1738 | mutex_lock(&local->iflist_mtx); |
1739 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1740 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1741 | continue; |
af8cdcd8 JB |
1742 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1743 | continue; | |
1744 | sdata->u.ibss.last_scan_completed = jiffies; | |
46900298 | 1745 | } |
29b4a4f7 | 1746 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1747 | } |
1748 | ||
af8cdcd8 JB |
1749 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1750 | struct cfg80211_ibss_params *params) | |
1751 | { | |
ff3cc5f4 | 1752 | u32 changed = 0; |
2103dec1 SW |
1753 | u32 rate_flags; |
1754 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1755 | enum ieee80211_chanctx_mode chanmode; |
1756 | struct ieee80211_local *local = sdata->local; | |
1757 | int radar_detect_width = 0; | |
2103dec1 | 1758 | int i; |
71965c1d LC |
1759 | int ret; |
1760 | ||
1761 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1762 | ¶ms->chandef, | |
1763 | sdata->wdev.iftype); | |
1764 | if (ret < 0) | |
1765 | return ret; | |
1766 | ||
1767 | if (ret > 0) { | |
1768 | if (!params->userspace_handles_dfs) | |
1769 | return -EINVAL; | |
1770 | radar_detect_width = BIT(params->chandef.width); | |
1771 | } | |
1772 | ||
1773 | chanmode = (params->channel_fixed && !ret) ? | |
1774 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1775 | ||
1776 | mutex_lock(&local->chanctx_mtx); | |
1777 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, | |
1778 | radar_detect_width); | |
1779 | mutex_unlock(&local->chanctx_mtx); | |
1780 | if (ret < 0) | |
1781 | return ret; | |
af8cdcd8 | 1782 | |
af8cdcd8 JB |
1783 | if (params->bssid) { |
1784 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1785 | sdata->u.ibss.fixed_bssid = true; | |
1786 | } else | |
1787 | sdata->u.ibss.fixed_bssid = false; | |
1788 | ||
fffd0934 | 1789 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1790 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1791 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1792 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1793 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1794 | |
1795 | /* fix basic_rates if channel does not support these rates */ | |
1796 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1797 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1798 | for (i = 0; i < sband->n_bitrates; i++) { |
1799 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1800 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1801 | } | |
dd5b4cc7 FF |
1802 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1803 | sizeof(params->mcast_rate)); | |
fffd0934 | 1804 | |
57c4d7b4 JB |
1805 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1806 | ||
3aede78a | 1807 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1808 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1809 | ||
1810 | if (params->ie) { | |
1811 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1812 | GFP_KERNEL); | |
1813 | if (sdata->u.ibss.ie) | |
1814 | sdata->u.ibss.ie_len = params->ie_len; | |
1815 | } | |
1816 | ||
af8cdcd8 JB |
1817 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1818 | sdata->u.ibss.ibss_join_req = jiffies; | |
1819 | ||
badecb00 | 1820 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1821 | sdata->u.ibss.ssid_len = params->ssid_len; |
1822 | ||
822854b0 SW |
1823 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1824 | sizeof(sdata->u.ibss.ht_capa)); | |
1825 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1826 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1827 | ||
ff3cc5f4 SW |
1828 | /* |
1829 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1830 | * reserved, but an HT STA shall protect HT transmissions as though | |
1831 | * the HT Protection field were set to non-HT mixed mode. | |
1832 | * | |
1833 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1834 | * also reserved, but an HT STA shall operate as though this field | |
1835 | * were set to 1. | |
1836 | */ | |
1837 | ||
1838 | sdata->vif.bss_conf.ht_operation_mode |= | |
1839 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1840 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1841 | ||
dcbe73ca | 1842 | changed |= BSS_CHANGED_HT | BSS_CHANGED_MCAST_RATE; |
ff3cc5f4 SW |
1843 | ieee80211_bss_info_change_notify(sdata, changed); |
1844 | ||
04ecd257 | 1845 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
71965c1d | 1846 | sdata->needed_rx_chains = local->rx_chains; |
018f6fbf | 1847 | sdata->control_port_over_nl80211 = params->control_port_over_nl80211; |
04ecd257 | 1848 | |
71965c1d | 1849 | ieee80211_queue_work(&local->hw, &sdata->work); |
af8cdcd8 JB |
1850 | |
1851 | return 0; | |
1852 | } | |
1853 | ||
1854 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1855 | { | |
5ea096c0 | 1856 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1857 | |
871a4180 | 1858 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1859 | ifibss->ssid_len = 0; |
c84a67a2 | 1860 | eth_zero_addr(ifibss->bssid); |
af8cdcd8 JB |
1861 | |
1862 | /* remove beacon */ | |
1863 | kfree(sdata->u.ibss.ie); | |
822854b0 SW |
1864 | |
1865 | /* on the next join, re-program HT parameters */ | |
1866 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1867 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1868 | ||
af8cdcd8 | 1869 | synchronize_rcu(); |
af8cdcd8 | 1870 | |
35f20c14 | 1871 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1872 | |
bc05d19f | 1873 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1874 | |
af8cdcd8 JB |
1875 | return 0; |
1876 | } |